Rotary pump



June 12, 1951 H. B. ADAMS ET AL- 2,556,313

llllll ROTARY PUMP A Filed Sept. 8, 1947 `2 Sheets-Sheet 1 I 4v ,a /4' o 7 K, y o

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\ ROTARY PUMP Filed Sept. 8, 1947 2 Sheets-Sheet 2 INVENToRs, 5670/4 ida/71,2 BY /az/f/ 6. ,27a/arf.

W70/Way Patented June 12, 1951 ROTARY PUMP Harold B. Adams, Madison, Kans., and Maurice C. Peters, Salt Lake City, Utah Application September 8, 1947, Serial No. 772,784

(Cl. S-136) 3 Claims.

This invention relates to improvements in rotary pumps and has particular reference to rotary pumps having reciprocating abutments.

The principal object of the present invention is the provision of a rotary pump having reciprocating, radially disposed abutments provided with contact edge portions adapted to work against outwardly converging arcuate bearing surfaces of uniform radial distance from the axis of rotation of said abutments.

Another object of the invention is the provision of rotary pump having radially disposed abutments or vanes normally urged to the operating position by a resilient member and adapted to be moved to the inoperative position by a segmental cam against the action of said resilient member. f

A further object is the provision of a rotary pump having operating abutments so mounted and operated in a rotor housing as to eliminate most of the objectional leakage of liquid between the relatively movable parts.

Other objects are sturdiness and simplicity of construction, efciency and ease of operation and adaptability for reversal of direction of rotation and for use as a reversible motor.

With these objects in view, as well as other objects which will appear during the course of the specification, reference will be had to the drawings wherein:

Figure 1 is an inverted view of a rotary pump embodying this invention.

Fig. 2 is a side elevation of the pump with one of the casing members removed and certain parts in section.

Fig. 3 is a sectional view taken on line III-III of Fig. 2.

Fig. 4 is a detached elevational View of the rotor and associated parts.

Fig. 5 is a fragmentary sectional view taken on line V-V of Fig. 2.

Fig. 6 is an enlarged sectional View taken on line VI--VI of Fig. 2.

Throughout the several views like reference characters refer to similar parts and the numeral Ill designates a pump comprising two similar housing members I2 and I4. Housing members I2 and I4 have like chamber recesses I6 and I8 respectively which when members I2 and I4 are properly fitted together form a symmetrical chamber for the operation of a rotor and associated parts. Housing member I2 is provided with an annular, radial flange 28, faced on its inner side to present an annular flange 22 and agroove 24. Housing member I4 is provided with an annular,

radial flange 26 faced to present a groove 28 adapted to receive the flange 26 of member I2, and provided with another annular groove 36 which registers with groove 24 of member I2, to receive a suitable packing ring 32 therebetween. Each member I2 and I4 is provided with a series of transverse holes 34 to receive bolts 36 by means of which the members are secured together. Housing member I2 has an axially disposed blind bearing member 38 and member I4 has a bearing member 40 provided with a stuingbox 42. A shaft 44 is axially mounted in housing I0 in bearings 38 and 4l] and extends outwardly therefrom to receive any suitable driving means, not shown. Rigidly mounted on shaft 44 is cylindrical rotor 46 which fits snugly against the side walls 48 and 50, respectively of members I2 and I4. Walls 48 and 56 are parallel and disposed at right angles to shaft 44.

For convenience of manufacture and assembly rotor 46 comprises two circular disc-like sections 52 and 54 joined together by means of machine screws 56. Each of the sections 52 and 54 are provided with a series of oil grooves 58 concentric with the shaft 44 and disposed adjacent their respective peripheries.

That portion of the housing chamber beyond the rotor 46 is symmetrically formed by members I2 and I4 by transversely curved end walls 66 and outwardly converging substantially frustoconical wall sections 62 tangent therewith. The rotor 46 mounted as described in housing I0 forms a substantially annular working chamber 64 having a double port 66 at its one side provided with passageways 68 and 'I6 which are of a crosssectional area substantially equal to that of working chamber 64. A partition I6 separating passageways 66 and 66 extends into working chamber 64 and is provided with an arcuate bearing section 'I2 positioned to contact the periphery of rotor 46 with which it is concentric. This structure is such that fluid delivered through one of the passageways 68 or I6 will be delivered to annular chamber 64 and out through the other passageway. Since this pump mechanism is symmetrical in form it is quite apparent that it will Work in substantially any manner regardless of the direction shaft 44 is rotated, furthermore, if fluid under pressure is delivered to the device, it may be used as a reversible motor.

Radially disposed blades or vanes I4 are slidably mounted in radial slots 'IG formed in rotor 46 which are adapted to be moved to and in a position in the path of fluid delivered to the annular working Vchamber 64, whereby fluid is pumped therefrom. Each vane is provided with a compression spring 18 mounted in a pocket 80 formed in the rotor, which normally urges the vane outwardly to contact the inner wall of the engine housing. It will be noted that the edge 82 of the vane 'I4 conforms to the inner circular wall of the housing l0.

The movement of vanes 'I4 are controlled by a cam 84 which are inset in the-inside walls of housing l Il and extend into the housing chamber, as shown. It will be noted that an annular groove 86 is formed in each side of the rotor 46 to receive the cam member 84. Each vane Hlzhasa side slot 88 formed in each of itsedges adjacent its inner end to cooperate withsaid camwhereby the vane is forced inwardly against 4the action of spring 18 to miss the arcuate: bearing.sectionl at each revolution of the rotor in the housing. The end portions 90 of the cam are positioned in the path of travel of the-slots l in vanes 14 and areso tapered that they will`freely enter saidfslts yand cause the vanes to be gradually drawninwardly in such amannerthat the edge 82 of the 'vane will never contact any surface eXceptthe uniform inner wall of the housing Ill. The vanes vI4 do not abut the inner wall of thehousing, when the rotor'is moving in the 'direction'indicated by the arrow in Fig. 2, until the Avane has reachedfsubstantially the point Cpand leaves the wall-at point D.

Referring to Fig. Y6, it'will 'be apparent that that portion of the Avane 'M whichcontacts the inner workingsurface of the housing' is inclined outwardly toward the center of the vane at all points outside the peripheral edge-of the rotor 46 so that as the vane is forced outwardly by spring -all portions of the extended vparts Yof the `vane will be forced against the inner wall of the housing whereby it will be Constantly urged to a workingt in the housing. lNaturally the outer central portion of the Vvane Will-be 4forced more firmly against the working -wall and will be worn down more rapidly than the inclined side edges of the vane. However, this s-tructure of the vane and the working wall will be such that a substantially perfect t will be obtained" between the vane and the inner working wall of the housing to preclude objectionable leakage of liquid therebetween. `It vwill be noted in the present inventionthat the-cam M extends only a-portion'of thedistance about the shaft and does not interfere in any manner with the free action or" thespring T3-'to seat ther vanes during the power stroke of the pump. During the operation of the pumpfand as the vanes are recipro- Acated there will. be some movement of the liquid to and'irorn `thecenter portion of the rotor and to better equalize the pressure in the various spring pockets, an annular groovel. isi provided ,in the central portion of the rollervwhich interconnects all of said pockets, as shown. The 'double port B6 extends through a neck 92 having an annular ilangez`94 by means of `which the pump'may'be attached-to any suitablerconnector for carrying liquid toandfrom the pump.

W hat we claim Yasnewand desire: to protectfby Letters Patent is:

1.A rotary engine comprisinga` housing having two'concentric wall sections of dierent radii and having side walls, a cylindrical rotor rotatably mounted in said housing in concentric relation with said wall sections of different radii and in contact with the 'wall section of lesser radius, 'whereby is formed in saidhousing-a substantially annular working'chamberbetweenT-said'rotor and said concentric wall of greater radius, said Working chamber having inlet and outlet ports respectively at opposite sides of said wall section of lesser radius, said working chamber having its side walls outwardly converging in `substantially frusto-conical shape, vanes having side slots mounted for reciprocaton in radial slots formed in said rotor and the outer ends of said -vanes'being shaped to conform tothe contour of the side walls of said working chamber, resilient means to constantly urge said vanes outwardly to close said working chamber, and means for engaging said slots during a portion of the rotation .of,.-,said..r.otor to force said vanes inwardly-against the action of said resilient means to clear said concentric wall of lesser radius as said rotoris rotated.

2. rAprotary engine comprising a housing having two concentric walls of different radii and having .side walls, a cylindrical rotor rotatably mounted in said housing in cencentric .relation with said .concentric walls ofdifferent radii,'in working. contact withsaid wall.of .lesser radius and in spaced apart relation .to the concentric walloi .greater radius'to form a-.substantially annular working chamber having outwardly converging side walls of substantially frusto-conical shape extending from the outer periphery of .said rotor, said working chamber having inlet arid outlet fports. respectively at Opposite sides ,of said Ywall section of lesser radius, vanes having side slots and being mounted f-orreciprocation in vradial slots formedinsaid rotor, .resilient'mernbers to constantly urge said vanesoutwardlyto .contact the side walls rof and to close Jsaid annular working chamber, and segmented cams carriedby saidhousing adapted to engage in the slots in said vanes'to move Ythe Vanesinwardly against the action of said resilient members to cleary saidconcentric wall vof lesser radius .at each complete'rotation of the rotor.

3. A rotary` engine comprising a housinglhaving two concentric walls of different radii and having side walls,.a.cylin`drical rotorrotatably mounted in said housingin concentric relation with said` concentric walls of `different.radi,f.in vworking contact ywith said Wall of llesser radius and in .spaced apart relation to the concentric wall of greater radius to forma substantially annular working chamberv havingV outwardlyconverging side walls of substantiallyl frusto-,conical shape extending from the .outer peripheryof said rotor, said working `chamber having inlet V.and outlet ports respectively at opposite sides of said wallsection of lesser radius, vanes having side slots and being mounted for reciprocationj in radial slots formed in said rotor, resilient members to constantly urge said vanes outwardly'to contact .the side wallsof and to closesaid annular working chamber, and segmented cams carried by said housing adaptedto engageLin the slots in said vanes to movethe-vanes inwardly against the action ofsaid resilient members 'to clear said concentric wall of .lesser radius Aas said rotor is caused .to rotate insad housing,.an`d.a passageway formed in said rotor to interconnect the various slots formed therein, the angular distance between the ends of each of said cams beinggreater than the angulardistance between two successive vanes.

(References `on following page) REFERENCES CITED The following references are of record in the le of this patent:

UNITED STATES PATENTS 5 Number Name Date 262,740 Carter Aug. 15, 1882 460,522 Bretherton Sept. 2,9, 1891 462,614 Beard NOV. 3, 1891 1,093,005 Myers Apr. 14j, 1914 10 Number Number Name Date Campbell June 30, 1914 Hayden July 28, 1914 Ronning et a1. Oct. 9, 1928 Country l Date Great'l Britain July 5, 1938 France Apr. 12, 1932 

